Motorola DSP56305 User Manual page 253

Table 6-18 Host Port Signals - Detailed Description (Sheet 13 of 13)
HI32
Port
a
Pin
HINTA
Host Interrupt A
Active low, open drain output signal
Used by the HI32 to request service from the host processor. HINTA may be connected to an interrupt request
signal of a host processor, a control input of external circuitry, or be used as a general purpose open-drain
output.
HINTA is asserted by the HI32 when HINT, in the DCTR, is set by the
HINTA is released (high impedance) when HINT, in the DCTR, is cleared by the
HINTA is asynchronous to HCLK.
a. This list does not include Vcc and Ground supply signals.
The GPIO pin is controlled by the corresponding bits in the port data and port direction registers.
b. Open Drain output signal is driven, when asserted, by the HI32. When deasserted the signal is released (high impedance). This enables
using a multi-slave configuration. An external pull-up, must be connected externally for proper operation.
PCI
b
.
HI32 Mode
Enhanced Universal
DSP56300
c.
b
Universal
GPIO
core.
DSP56300
core.